Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output access regulation
Reexamination Certificate
2007-10-23
2007-10-23
Kim, Hong (Department: 2185)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output access regulation
C365S120000, C711S105000
Reexamination Certificate
active
11130911
ABSTRACT:
A method, an apparatus, and a computer program product are provided for the handling of write mask operations in an XDR™ DRAM memory system. This invention eliminates the need for a two-port array because the mask generation is done as the data is received. Less logic is needed for the mask calculation because only 144 of the 256 possible byte values are decoded. The mask value is generated and stored in a mask array. Independently, the write data is stored in a write buffer. The mask value is utilized to generate a write mask command. Once the write mask command is issued, the write data and the mask value are transmitted to a multiplexer. The multiplexer masks the write data using the mask value, so that the masked data can be stored in the XDR DRAMS.
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Ganfield Paul Allen
Haselhorst Kent Harold
Johns Charles Ray
Liu Peichun Peter
Gerhardt Diana R.
Kim Hong
Walder, Jr. Stephen J.
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